[MacBookPro6,2, Cirrus Logic ID 4206, Speaker, Internal] No sound at all

[Wolf Rogner]

After upgrade to Natty, sound did not work.

Alsamixer set to 70% -> no sound

There used to be 4 speakers in the sound control of 10.10 now only 2 speakers appear. Maybe, front and back was mixed up?

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: alsa-base 1.0.24+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: wl nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: HDA Generic [HDA Generic]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: wolf 1801 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xc1d00000 irq 42'
   Mixer name : 'Cirrus Logic ID 4206'
   Components : 'HDA:10134206,106b0b00,00100301'
   Controls : 5
   Simple ctrls : 3
Card1.Amixer.info:
 Card hw:1 'NVidia'/'HDA NVidia at 0xc1080000 irq 16'
   Mixer name : 'Nvidia GPU 0a HDMI/DP'
   Components : 'HDA:10de000a,10de0101,00100100'
   Controls : 16
   Simple ctrls : 4
Date: Sun May 1 13:06:56 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64+mac (20101008)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=de_AT.UTF-8
 LC_MESSAGES=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Intel failed
Symptom_Card: Internal Audio - HDA Intel
Symptom_DevicesInUse: 1801
Symptom_Jack: Speaker, Internal
Symptom_Type: No sound at all
Title: [MacBookPro6,2, Cirrus Logic ID 4206, Speaker, Internal] No sound at all
UpgradeStatus: Upgraded to natty on 2011-04-30 (1 days ago)
dmi.bios.date: 07/26/10
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP61.88Z.0057.B0C.1007261552
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-F22586C8
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro6,2
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F22586C8
dmi.modalias: dmi:bvnAppleInc.:bvrMBP61.88Z.0057.B0C.1007261552:bd07/26/10:svnAppleInc.:pnMacBookPro6,2:pvr1.0:rvnAppleInc.:rnMac-F22586C8:rvrMacBookPro6,2:cvnAppleInc.:ct10:cvrMac-F22586C8:
dmi.product.name: MacBookPro6,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

[Wolf Rogner (war-rsb)]

Additional research:

alsamixer claims the card to be on irq 42, lshw claims the card to be on irg 41.

How can I fix this? And which one is correct?

[Wolf Rogner (war-rsb)]

Problem fixed:

Fix: Removed old dkms kernel module snd-hda-dkms (maverick 1.0.0)

Reason: Obviously, this driver could not be loaded with the new kernel.

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for alsa-driver (Ubuntu) because there has been no activity for 60 days.]